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CVE-2022-4696 There exists a use-after-free vulnerability in the Linux kernel through io_uring and the IORING_OP_SPLICE operation

Description

There exists a use-after-free vulnerability in the Linux kernel through io_uring and the IORING_OP_SPLICE operation. If IORING_OP_SPLICE is missing the IO_WQ_WORK_FILES flag, which signals that the operation won't use current->nsproxy, so its reference counter is not increased. This assumption is not always true as calling io_splice on specific files will call the get_uts function which will use current->nsproxy leading to invalidly decreasing its reference counter later causing the use-after-free vulnerability. We recommend upgrading to version 5.10.160 or above

Produits et versions touchés

Produit Versions touchées Corrigé en
Linux Kernel 5.7 5.7-rc1 → 5.10.159 Pas de correctif indiqué
linux_kernel 5.7 5.7-rc1 → 5.10.159 Pas de correctif indiqué

Références

Chronologie

  1. Publiée
  2. Dernière modification
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